Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 0	$ 0
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, Authorized shares	150,000,000	150,000,000
Common stock, shares issued	45,962,324	35,019,740
Common stock, shares outstanding	45,962,324	35,019,740
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, Authorized shares	13,000,000	13,000,000
Common stock, shares issued	8,885	8,885
Common stock, shares outstanding	8,885	8,885